Same reason some young men play chicken with traffic. Paradoxically, it's likely a signal of fitness. A young man who can still manage sex successfully under

Same reason some young men play chicken with traffic. Paradoxically, it's likely a signal of fitness. A young man who can still manage sex successfully under the burden of multiple addictions probably has decent genes, cardiovascularly speaking. Probably why men are much more likely than women to take such risks, too.